地月系L_2点Lissajous轨道卫星对地月的跟踪规律研究

The Tracking Laws Relative to Earth-Moon of Spacecrafts on the Lissajous Orbits around L_2 Point

地月系L2点附近的Lissajous轨道,可以用于月球背面探测。以此为背景,研究运行于Lissajous轨道上的中继卫星对月球和地球的跟踪规律。给出非常适于两轴转动天线运动分析的Lissajous轨道卫星的姿态描述,并初步分析了该卫星本体姿态的测量方案。推导天线中心指向地心和月心的机动角变化规律,并用统计的方法给出了对地跟踪不被月球遮挡的概率;分析Lissajous轨道参数与跟踪规律的关系;基于避免同时处于遮挡区考虑,设计了中继卫星的任务交替策略;最后,研究天线波束宽度对指向精度的影响。所得跟踪规律经数值验证是正确的。

The Lissajous orbit about L2 point of Earth and Moon system can be employed to explore the lunar farside which is beyond our view,so the tracking laws from Tracking and Data Relay Satellites(TDRS) on the orbit to the Moon and Earth is presented in this paper.The scheme of spacecraft's attitude description is proposed to model the motions of the antenna large maneuvering with two freedoms.The tracking angles and angular velocities of the antenna are derived,associated with the probability of TDRS pointing to...